Most badass skill

So I asked my Facebook friends what the most badass skill one can have is, and I think I want to try to do a series on trying some of the skills (or modified versions of the skills). The skills are:

• Communicating well (how I will do this is by attending x number of Toastmaster meet ups to improve my speachmaking abilities)
• Balance a checkbook. (Do a week of manual checkbook entries and compare it at the end of the week.)
• Speaking more than 2 languages (share my progress learning Spanish, ASL, and Japanese)
• Self Defence/Krav maga (sign up for martial arts lessons)
• Perseverance (write a post on the things I learned from being sick)
• Axe or knife throwing (buy throwing daggers, set up a target, and practice)
• Beer pong skills. (Go to my friends house and challenge them to beer pong, looking up YouTube pointer videos)
• Cooking (cook 3 challenging recipes and have friends over to taste test them)
• Liking yourself (write a post of 50 things I like about myself.)
• Being nice to mean people. (I'm at a loss for this one)

That would be a fun series to do, I think. I might start it in the summer. If you have another suggestion, please let me know!